示例JSON数据（每次运行会随机生成）：

1. 简单对象示例:
{
    "id": ${id},
    "name": "${name}",
    "age": ${age},
    "email": "${email}",
    "phone": "${phone}",
    "active": ${isActive?string}
}

2. 嵌套对象示例:
{
    "id": ${id},
    "userInfo": {
        "name": "${name}",
        "age": ${age},
        "contact": {
            "email": "${email}",
            "phone": "${phone}",
            "address": {
                "city": "${city}",
                "district": "${district}",
                "street": "示例路${random.nextInt(100)}号",
                "zipCode": "${random.nextInt(100000) + 100000}"
            }
        }
    },
    "account": {
        "accountId": "ACC${random.nextInt(10000)}",
        "balance": ${random.nextInt(10000)}.${random.nextInt(100)},
        "type": "${["储蓄账户", "信用账户", "投资账户"][random.nextInt(3)]}",
        "status": {
            "active": ${isActive?string},
            "level": "${level}",
            "points": ${points},
            "lastLoginTime": "2024-${random.nextInt(12)+1}-${random.nextInt(28)+1}"
        }
    }
}

3. 数组和对象组合示例:
{
    "id": ${id},
    "name": "${name}",
    "departments": [
        {
            "id": "DEPT${random.nextInt(100)}",
            "name": "${["技术部", "市场部", "销售部", "人事部", "财务部"][random.nextInt(5)]}",
            "manager": {
                "id": "MGR${random.nextInt(100)}",
                "name": "${names[random.nextInt(5)]}",
                "title": "${["总监", "经理", "主管", "组长"][random.nextInt(4)]}"
            },
            "employees": [
                <#list 1..3 as i>
                {
                    "id": "EMP${random.nextInt(1000)}",
                    "name": "${names[random.nextInt(5)]}",
                    "position": "${["开发工程师", "测试工程师", "产品经理", "运维工程师"][random.nextInt(4)]}",
                    "skills": [
                        <#list 1..3 as j>
                        "${techs[random.nextInt(8)]}"<#if j < 3>,</#if>
                        </#list>
                    ]
                }<#if i < 3>,</#if>
                </#list>
            ]
        }
    ],
    "projects": [
        <#list 1..2 as i>
        {
            "projectId": "PRJ${random.nextInt(1000)}",
            "name": "${["电商平台", "支付系统", "CRM系统", "OA系统", "数据分析平台"][random.nextInt(5)]}",
            "status": "${["规划中", "进行中", "已完成", "已暂停"][random.nextInt(4)]}",
            "team": {
                "leader": {
                    "id": "TL${random.nextInt(100)}",
                    "name": "${names[random.nextInt(5)]}",
                    "level": "${["P6", "P7", "P8"][random.nextInt(3)]}"
                },
                "members": [
                    <#list 1..3 as j>
                    {
                        "id": "MEM${random.nextInt(1000)}",
                        "name": "${names[random.nextInt(5)]}",
                        "role": "${["前端", "后端", "测试", "运维", "产品"][random.nextInt(5)]}"
                    }<#if j < 3>,</#if>
                    </#list>
                ]
            }
        }<#if i < 2>,</#if>
        </#list>
    ]
}

4. 复杂业务对象示例:
{
    "orderId": "ORD${random.nextInt(10000)}",
    "userId": "USR${random.nextInt(1000)}",
    "orderTime": "2024-${random.nextInt(12)+1}-${random.nextInt(28)+1} ${random.nextInt(24)}:${random.nextInt(60)}:${random.nextInt(60)}",
    "customer": {
        "id": ${id},
        "name": "${name}",
        "vipInfo": {
            "level": "${level}",
            "points": ${points},
            "benefits": [
                <#list ["免运费", "优先发货", "专属客服", "生日礼包", "积分加倍"] as benefit>
                "${benefit}"<#if benefit_has_next>,</#if>
                </#list>
            ]
        },
        "deliveryAddresses": [
            <#list 1..2 as i>
            {
                "id": "ADDR${random.nextInt(100)}",
                "receiver": "${names[random.nextInt(5)]}",
                "phone": "${phone}",
                "address": {
                    "province": "${["北京", "上海", "广东", "浙江", "江苏"][random.nextInt(5)]}",
                    "city": "${cities[random.nextInt(5)]}",
                    "district": "${districts[random.nextInt(5)]}",
                    "detail": "${["幸福小区", "阳光花园", "科技园", "商务中心", "创业大厦"][random.nextInt(5)]}${random.nextInt(100)}号"
                },
                "isDefault": ${(i == 1)?string}
            }<#if i < 2>,</#if>
            </#list>
        ]
    },
    "items": [
        <#list 1..3 as i>
        {
            "productId": "PRD${random.nextInt(1000)}",
            "name": "${["智能手机", "笔记本电脑", "平板电脑", "智能手表", "耳机"][random.nextInt(5)]}",
            "price": ${1000 + random.nextInt(9000)}.${random.nextInt(100)},
            "quantity": ${1 + random.nextInt(5)},
            "specs": {
                "color": "${["黑色", "白色", "金色", "银色", "蓝色"][random.nextInt(5)]}",
                "size": "${["标准版", "豪华版", "至尊版"][random.nextInt(3)]}",
                "warranty": "${random.nextInt(24) + 12}个月"
            }
        }<#if i < 3>,</#if>
        </#list>
    ],
    "payment": {
        "method": "${["支付宝", "微信支付", "银行卡", "花呗"][random.nextInt(4)]}",
        "status": "${["待支付", "已支付", "已退款"][random.nextInt(3)]}",
        "amount": ${random.nextInt(10000)}.${random.nextInt(100)},
        "discount": ${random.nextInt(1000)}.${random.nextInt(100)}
    }
}
